352 WebSphere Application Server V8.5 Concepts, Planning, and Design Guide
11.2.4 Session Initiation Protocol applications
A Session Initiation Protocol (SIP) application is a Java program that uses at least one SIP
servlet. A
SIP servlet is a Java-based application component that is managed by a SIP servlet
container and that runs SIP signaling. SIP servlets interact with clients by exchanging request
and response messages through the servlet container.
SIP is used to establish, modify, and terminate multimedia IP sessions, including IP
telephony, presence, and instant messaging.
Presence in this context refers to the user status,
such as active, away, or do not disturb. The standard that defines a programming model for
writing SIP-based ser ...